Denis Malgin (born 18 January 1997) is a Swiss professional ice hockey centre who is currently playing under contract with the ZSC Lions of the National League (NL).

[7] During the 2019–20 season, Malgin registered 12 points in 36 games with the Panthers before he was traded to the Toronto Maple Leafs in exchange for forward Mason Marchment on 19 February 2020.

He began the 2020–21 NL season with Lausanne HC on loan from the Leafs while the start of the North American was delayed due to the ongoing pandemic.

[12] After a successful training camp and productive pre-season, finishing as one of the team's offensive leaders, Malgin made the Maple Leafs opening night roster to begin the 2022–23 season.

[13] Malgin collected 4 points through 23 games before his tenure with the Maple Leafs ended as he was traded to the Colorado Avalanche in exchange for Dryden Hunt on 19 December 2022.

[16] Unsatisfied with the NHL interest at the opening of free agency, Malgin opted to return Switzerland and sign a five-year contract with his original club, ZSC Lions, on 18 July 2023.

[21] Malgin's brother Dmitri is also a professional ice hockey player, playing in the 1ère Ligue, the fourth-tier league in Switzerland.